Hydrodynamics properties of dark matter
Date
2023-07
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Benemérita Universidad Autónoma de Puebla
Abstract
“The Standard Model of Cosmology relies on the existence of a dark matter component that drives structure and galaxy formation. However, some tensions at small scales give rise to numerous explanations, many of them related to the nature of dark matter. In this thesis, the effect of different dark matter candidates on the formation and evolution of astrophysical systems has been studied, from a numerical approach. First, the properties of the Generalized Dark Matter (GDM) model were explored, which depends on three free parameters that produce a cut-off effect in the linear matter power spectrum. This condition is reflected in the suppression of small-scale. In particular, the so-called Hickson Compact Groups have been identified in three different scenarios of GDM: GDM I, II, and III. The first one has a very subtle cut-off associated, while the last one has a very pronounced cut at small scales. There are different mechanisms of agglomeration, for those models with a large amount of galaxy-halo self-agglomerate because of their abundance while fewer galaxies need massive halos acting as a dominant potential well. Additionally, a larger amount of compact groups are counted in GDM models in comparison to CDM”.
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